Rostock 2019 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 36: Quantum dynamics in tailored waveforms
A 36.2: Hauptvortrag
Freitag, 15. März 2019, 11:00–11:30, S HS 3 Physik
Chiral fragmentation of a planar molecule — •Kilian Fehre1, Sebastian Eckart1, Maksim Kunitski1, Martin Pitzer2, Stefan Zeller1, Christian Janke1, Daniel Trabert1, Jonas Rist1, Miriam Weller1, Alexander Hartung1, Lothar Schmidt1, Till Jahnke1, Robert Berger3, Reinhard Dörner1, and Markus Schöffler1 — 1Institut für Kernphysik Goethe-Universität Frankfurt, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany — 2Chemical Physics Department Weizmann Institute of Science P.O. Box 26, 76100 Rehovot Israel — 3Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany
Most building blocks of living nature are chiral (their mirror image cannot be superimposed with the initial object). We investigate the fully detected five body break-up of formic acid with the COLTRIMS (CoLd Target Recoil Ion Momentum Spectroscopy) technology and discuss two exciting new effects. Firstly, upon n*π^* transition, the initially planar molecule becomes chiral. The observed enantiomer strongly depends on the orientation of the molecule with respect to the light propagation direction and the helicity of the ionizing light. This finding might pave the way for future, purely light-driven control of stereochemistry starting from achiral precursors. Secondly, we observe a very strong (up to 20 %) differential PICD (PhotoIon Circular Dichroism). Like PECD (PhotoElectron Circular Dichroism), PICD shows its self as sensitive probe for the molecular structure.